GB1316408A - Control devices for electronically generated light pulses - Google Patents

Control devices for electronically generated light pulses

Info

Publication number
GB1316408A
GB1316408A GB5409172A GB5409170A GB1316408A GB 1316408 A GB1316408 A GB 1316408A GB 5409172 A GB5409172 A GB 5409172A GB 5409170 A GB5409170 A GB 5409170A GB 1316408 A GB1316408 A GB 1316408A
Authority
GB
United Kingdom
Prior art keywords
control devices
light pulses
generated light
electronically generated
photo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5409172A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ponder & Best
Original Assignee
Ponder & Best
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ponder & Best filed Critical Ponder & Best
Publication of GB1316408A publication Critical patent/GB1316408A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0514—Separate unit
    • G03B2215/0517—Housing
    • G03B2215/0525—Reflector
    • G03B2215/0528—Reflector movable reflector, e.g. change of illumination angle or illumination direction

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Stroboscope Apparatuses (AREA)
  • Measurement Of Optical Distance (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1316408 Photo-electric flash control PONDER & BEST Inc 27 Apr 1970 [27 June 1969 22 Sept 1969] 54091/72 Divided out of 1309771 Heading G1A The description is the same as the parent but the claims are directed to an electronic flash arrangement, the duration of which is controlled by the photo electrically measured light reflected from the subject wherein the control circuit includes two Zener diodes providing reference voltages used for supply voltage control and comparison of the measurement voltage for triggering purposes.
GB5409172A 1969-03-07 1970-04-27 Control devices for electronically generated light pulses Expired GB1316408A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE71104 1969-03-07
BE75962 1969-06-27
BE79321 1969-09-22

Publications (1)

Publication Number Publication Date
GB1316408A true GB1316408A (en) 1973-05-09

Family

ID=27158453

Family Applications (4)

Application Number Title Priority Date Filing Date
GB1088370A Expired GB1309771A (en) 1969-03-07 1970-03-06 Light sensing devices
GB5409272A Expired GB1316409A (en) 1969-03-07 1970-04-27 Control devices for electronically generated light pulses
GB5409172A Expired GB1316408A (en) 1969-03-07 1970-04-27 Control devices for electronically generated light pulses
GB5409372A Expired GB1316410A (en) 1969-03-07 1970-04-27 Control devices for electronically generated light pulses

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB1088370A Expired GB1309771A (en) 1969-03-07 1970-03-06 Light sensing devices
GB5409272A Expired GB1316409A (en) 1969-03-07 1970-04-27 Control devices for electronically generated light pulses

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB5409372A Expired GB1316410A (en) 1969-03-07 1970-04-27 Control devices for electronically generated light pulses

Country Status (2)

Country Link
JP (1) JPS5436490B1 (en)
GB (4) GB1309771A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD496Z (en) * 2011-03-24 2012-10-31 Лев ГОРДЕЕВ Method for automatically providing the optimal illumination of the photographed object

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340426A (en) * 1965-05-04 1967-09-05 Honeywell Inc Control system for terminating the discharge through a flash lamp

Also Published As

Publication number Publication date
GB1309771A (en) 1973-03-14
JPS5436490B1 (en) 1979-11-09
GB1316410A (en) 1973-05-09
GB1316409A (en) 1973-05-09

Similar Documents

Publication Publication Date Title
CA944050A (en) Glass-domed electroluminescent diode
CA942880A (en) Semiconductor diode for an injection laser
GB1398909A (en) Displacement-measuring systems
GB1316408A (en) Control devices for electronically generated light pulses
CA918751A (en) Constant current series regulator with control of bias current energizing control circuit of the regulator
CA928774A (en) Transistor circuit arrangement for supplying a load with work pulses of constant current intensity
AT319665B (en) Electronic control device for the controlled diode of an electronic ignition circuit with capacitive discharge
AU453692B2 (en) An improved zener diode for monolithic integrated circuits
CA770831A (en) Pulse generator diode
AU1496270A (en) An improved zener diode for monolithic integrated circuits
CA766374A (en) Pulse generating circuit for rectifier systems
FR1507218A (en) Detection circuit for pulse code modulation signals
GB1268879A (en) Light sensitive integrated circuits
CA828912A (en) Accurate once-around pulse generating system
CA723252A (en) Voltage sensitive diode switch
CA901150A (en) Memory device utilizing pulse generating diode
CA720916A (en) Pulse generator circuit
AU430992B2 (en) Circuit for generating artificial echoes
CA751048A (en) Pulse generating circuit arrangements
GB1257309A (en)
FR1447443A (en) Symmetrical electrical signal generator
CA740129A (en) Pulse generating circuit
FR1510894A (en) Time signal generator
GB1314908A (en) Control of electronic flashlight apparatus
CA767264A (en) Pulse generator circuit

Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years